The increased capacity of DNA sequencing has significantly advanced our understanding of
the phylogeny of birds and the proximate and ultimate mechanisms molding their genomic …

Understanding the mechanisms underlying species formation and differentiation is a central
goal of evolutionary biology and a formidable challenge. This understanding can provide …

The relative importance of introgression for diversification has long been a highly disputed
topic in speciation research and remains an open question despite the great attention it has …

Penguins lost the ability to fly more than 60 million years ago, subsequently evolving a hyper-
specialized marine body plan. Within the framework of a genome-scale, fossil-inclusive …

Polar bears (Ursus maritimus) and brown bears (Ursus arctos) are sister species possessing
distinct physiological and behavioural adaptations that evolved over the last 500,000 years …

Global cooling and glacial–interglacial cycles since Antarctica's isolation have been
responsible for the diversification of the region's marine fauna. By contrast, these same Earth …

Cotton (Gossypium) stands as a crucial economic crop, serving as the primary source of
natural fiber for the textile sector. However, the evolutionary mechanisms driving speciation …

Penguins (Sphenisciformes) are an iconic order of flightless, diving seabirds distributed
across a large latitudinal range in the Southern Hemisphere. The extensive area over which …

Notothenioid fishes, a perciform group, radiated in the cold shelf waters around the Antarctic
continent and the 110 species dominate fish diversity, abundance, and biomass at levels …

Variation in formant frequencies has been shown to affect social interactions and sexual
competition in a range of avian species. Yet, the anatomical bases of this variation are …